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From: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
To: Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
	Dave Hansen <dave.hansen@linux.intel.com>,
	x86@kernel.org
Cc: daniel.sneddon@linux.intel.com, tony.luck@intel.com,
	linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org,
	linux-perf-users@vger.kernel.org,
	Josh Poimboeuf <jpoimboe@kernel.org>,
	Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>,
	"Rafael J. Wysocki" <rafael@kernel.org>,
	Ricardo Neri <ricardo.neri-calderon@linux.intel.com>,
	"Liang, Kan" <kan.liang@linux.intel.com>,
	Andrew Cooper <andrew.cooper3@citrix.com>,
	Brice Goglin <brice.goglin@gmail.com>,
	Mario Limonciello <mario.limonciello@amd.com>,
	Perry Yuan <Perry.Yuan@amd.com>,
	Dapeng Mi <dapeng1.mi@linux.intel.com>
Subject: [PATCH PATCH v2 3/9] perf/x86/intel: Use topology_hw_cpu_type()
Date: Thu, 27 Jun 2024 13:44:18 -0700	[thread overview]
Message-ID: <20240627-add-cpu-type-v2-3-f927bde83ad0@linux.intel.com> (raw)
In-Reply-To: <20240627-add-cpu-type-v2-0-f927bde83ad0@linux.intel.com>

get_this_hybrid_cpu_type() misses a case when cpu-type is populated
regardless of X86_FEATURE_HYBRID_CPU. This is particularly true for hybrid
variants that have P or E cores fused off.

Instead use topology_hw_cpu_type() as it does not rely on hybrid feature to
enumerate cpu-type. This can also help avoid the model-specific fixup
get_hybrid_cpu_type().

Suggested-by: Dave Hansen <dave.hansen@linux.intel.com>
Signed-off-by: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
---
 arch/x86/events/intel/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/events/intel/core.c b/arch/x86/events/intel/core.c
index 38c1b1f1deaa..0da1fd14b0ea 100644
--- a/arch/x86/events/intel/core.c
+++ b/arch/x86/events/intel/core.c
@@ -4753,7 +4753,7 @@ static void intel_pmu_check_hybrid_pmus(struct x86_hybrid_pmu *pmu)
 
 static struct x86_hybrid_pmu *find_hybrid_pmu_for_cpu(void)
 {
-	u8 cpu_type = get_this_hybrid_cpu_type();
+	u8 cpu_type = topology_hw_cpu_type(smp_processor_id());
 	int i;
 
 	/*

-- 
2.34.1



  parent reply	other threads:[~2024-06-27 20:44 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-06-27 20:44 [PATCH v2 0/9] Add CPU-type to topology Pawan Gupta
2024-06-27 20:44 ` [PATCH PATCH v2 1/9] x86/cpu/topology: Add CPU type to struct cpuinfo_topology Pawan Gupta
2024-06-28  8:03   ` Borislav Petkov
2024-06-28 17:32     ` [PATCH " Pawan Gupta
2024-07-03 23:07       ` Borislav Petkov
2024-07-09  1:24         ` Pawan Gupta
2024-07-09 12:45           ` Borislav Petkov
2024-06-27 20:44 ` [PATCH PATCH v2 2/9] cpufreq: intel_pstate: Use topology_cpu_type() Pawan Gupta
2024-07-01 17:08   ` Rafael J. Wysocki
2024-07-01 17:14     ` Pawan Gupta
2024-06-27 20:44 ` Pawan Gupta [this message]
2024-06-28  8:59   ` [PATCH PATCH v2 3/9] perf/x86/intel: Use topology_hw_cpu_type() Mi, Dapeng
2024-06-28 18:51     ` [PATCH " Pawan Gupta
2024-07-01  3:37       ` Mi, Dapeng
2024-07-01 17:32         ` Pawan Gupta
2024-06-27 20:44 ` [PATCH PATCH v2 4/9] x86/cpu: Remove get_this_hybrid_cpu_type() Pawan Gupta
2024-06-27 20:44 ` [PATCH PATCH v2 5/9] x86/cpu: Name CPU matching macro more generically (and shorten) Pawan Gupta
2024-06-27 20:44 ` [PATCH PATCH v2 6/9] x86/cpu: Add cpu_type to struct x86_cpu_id Pawan Gupta
2024-06-27 20:44 ` [PATCH PATCH v2 7/9] x86/cpu: Update x86_match_cpu() to also use cpu-type Pawan Gupta
2024-06-27 20:44 ` [PATCH PATCH v2 8/9] x86/bugs: Declutter vulnerable CPU list Pawan Gupta
2024-07-03  1:00   ` Josh Poimboeuf
2024-07-03 18:09     ` Pawan Gupta
2024-06-27 20:44 ` [PATCH PATCH v2 9/9] x86/rfds: Exclude P-only parts from the RFDS affected list Pawan Gupta
2024-07-03  1:04   ` Josh Poimboeuf
2024-07-03 18:26     ` Pawan Gupta
2024-07-03 22:04       ` Josh Poimboeuf

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